https://phys.org/news/2021-06-ultracomp ... meter.html
by Yale University
An international team of researchers has developed a mid-infrared spectrometer smaller than the diameter of a human hair.
With potential applications that range from detecting greenhouse gases to making self-driving vehicles safer, there has been a great deal of interest in recent years in developing compact, on-chip spectrometers. Traditional spectrometers, which measure the spectral information of light, are bulky and expensive. An on-chip spectrometer would greatly expand the applications and accessibility of the technology.
Toward this goal, a team of researchers in the U.S., Israel, and Japan has developed an ultracompact mid-infrared spectrometer. The work is the result of a collaboration between the laboratory of Fengnian Xia, the Barton L. Weller Associate Professor in Engineering and Science at Yale University; Professor Doron Naveh of Bar-Ilan University, Israel; Kenji Watanabe and Takashi Taniguchi of National Institute for Materials Science, Japan. The findings were recently published in Nature Photonics.